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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GL_GL_SURFACE_PRESENTATION_HELPER_H_
#define UI_GL_GL_SURFACE_PRESENTATION_HELPER_H_
#include "base/containers/circular_deque.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "ui/gfx/swap_result.h"
#include "ui/gl/gl_export.h"
#include "ui/gl/gl_surface.h"
namespace gfx {
class VSyncProvider;
}
namespace gl {
class GLContext;
class GLFence;
class GPUTimingClient;
class GPUTimer;
// Helper class for managering and invoke presentation callbacks for GLSurface
// implementations.
class GL_EXPORT GLSurfacePresentationHelper {
public:
class GL_EXPORT ScopedSwapBuffers {
public:
ScopedSwapBuffers(GLSurfacePresentationHelper* helper,
GLSurface::PresentationCallback callback);
ScopedSwapBuffers(GLSurfacePresentationHelper* helper,
GLSurface::PresentationCallback callback,
int frame_id);
ScopedSwapBuffers(const ScopedSwapBuffers&) = delete;
ScopedSwapBuffers& operator=(const ScopedSwapBuffers&) = delete;
~ScopedSwapBuffers();
void set_result(gfx::SwapResult result) { result_ = result; }
gfx::SwapResult result() const { return result_; }
private:
const raw_ptr<GLSurfacePresentationHelper> helper_;
gfx::SwapResult result_ = gfx::SwapResult::SWAP_ACK;
};
explicit GLSurfacePresentationHelper(gfx::VSyncProvider* vsync_provider);
// For using fixed VSync provider.
GLSurfacePresentationHelper(const base::TimeTicks timebase,
const base::TimeDelta interval);
GLSurfacePresentationHelper(const GLSurfacePresentationHelper&) = delete;
GLSurfacePresentationHelper& operator=(const GLSurfacePresentationHelper&) =
delete;
~GLSurfacePresentationHelper();
void OnMakeCurrent(GLContext* context, GLSurface* surface);
void PreSwapBuffers(GLSurface::PresentationCallback callback, int frame_id);
void PostSwapBuffers(gfx::SwapResult result);
private:
struct Frame {
Frame(Frame&& other);
Frame(int frame_id, GLSurface::PresentationCallback callback);
Frame(std::unique_ptr<GPUTimer>&& timer,
GLSurface::PresentationCallback callback);
Frame(std::unique_ptr<GLFence>&& fence,
GLSurface::PresentationCallback callback);
explicit Frame(GLSurface::PresentationCallback callback);
~Frame();
Frame& operator=(Frame&& other);
void Destroy(bool has_context = false);
std::unique_ptr<GPUTimer> timer;
// GLFence is used only if gpu timers are not available.
std::unique_ptr<GLFence> fence;
int frame_id = -1;
GLSurface::PresentationCallback callback;
gfx::SwapResult result = gfx::SwapResult::SWAP_ACK;
};
bool GetFrameTimestampInfoIfAvailable(const Frame& frame,
base::TimeTicks* timestamp,
base::TimeDelta* interval,
base::TimeTicks* writes_done,
uint32_t* flags);
// Check |pending_frames_| and run presentation callbacks.
void CheckPendingFrames();
// Callback used by PostDelayedTask for running CheckPendingFrames().
void CheckPendingFramesCallback();
void UpdateVSyncCallback(bool should_check_pending_frames,
const base::TimeTicks timebase,
const base::TimeDelta interval);
void ScheduleCheckPendingFrames(bool align_with_next_vsync);
const raw_ptr<gfx::VSyncProvider> vsync_provider_;
scoped_refptr<GLContext> gl_context_;
raw_ptr<GLSurface> surface_ = nullptr;
scoped_refptr<GPUTimingClient> gpu_timing_client_;
base::circular_deque<Frame> pending_frames_;
base::TimeTicks vsync_timebase_;
base::TimeDelta vsync_interval_;
bool check_pending_frame_scheduled_ = false;
bool gl_fence_supported_ = false;
raw_ptr<EGLTimestampClient> egl_timestamp_client_ = nullptr;
bool update_vsync_pending_ = false;
base::WeakPtrFactory<GLSurfacePresentationHelper> weak_ptr_factory_{this};
};
} // namespace gl
#endif // UI_GL_GL_SURFACE_PRESENTATION_HELPER_H_
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